I don't know where do you got the fact that "herp it means gm is looking for that char", got any proof about that or are you just talking out of your ass? Because it would completely make sense that instead of saying [report subject] or anything like that on a cheater, a "GM" sign would instead pop on top of a characters head, right?
Now on topic, I don't know and I don't care if the random spanish speaker in the OP's picture had GM powers or edited files, or played in a comp with edited files for that "GM" thing to pop up, it doesn't matter really because it's just a random picture. Could even be photoshopped lol.
PS: Judging by your reply, it seems that his troll attempt got you really mad. Successful (yet mediocre) troll was successful?